/* Shared site header/nav — works with or without design-tokens.css (every var has a fallback) */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.site-header{position:sticky;top:0;z-index:50;background:var(--header-bg, rgba(11,14,19,.92));backdrop-filter:blur(10px);border-bottom:1px solid var(--line,#1E252F)}
.site-nav{max-width:1080px;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:18px;justify-content:space-between;min-height:56px}

.site-nav .logo{font-family:var(--mono,"IBM Plex Mono",monospace);font-weight:600;font-size:1.2rem;color:var(--paper,#E8EAEE);text-decoration:none;display:inline-flex;align-items:center}
.site-nav .logo .dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--good,#22C55E);margin-right:6px}

.nav-menu{display:flex;gap:4px;align-items:center;font-size:.9rem}
.nav-menu > a,.nav-menu .dd-trigger{color:var(--muted,#97A2B0);text-decoration:none;font-weight:500;padding:8px 10px;border-radius:6px;background:none;border:0;font:inherit;cursor:pointer;display:inline-flex;align-items:center;gap:6px;min-height:44px;transition:color .15s,background .15s}
.nav-menu > a:hover,.nav-menu > a:focus,.nav-menu .dd-trigger:hover,.nav-menu .dd-trigger:focus{color:var(--paper,#E8EAEE);background:rgba(30,37,47,.4);text-decoration:none}
.nav-menu > a[aria-current="page"],.nav-menu .dd-menu a[aria-current="page"]{color:var(--paper,#E8EAEE);box-shadow:inset 0 -2px 0 var(--accent,#FF7A1A)}
.nav-menu a:focus-visible,.nav-menu button:focus-visible,.nav-toggle:focus-visible{outline:2px solid var(--accent,#FF7A1A);outline-offset:2px}

/* dropdown — flush to trigger (no hover gap), ::before bridge keeps hover alive */
.dropdown{position:relative}
.dd-menu{display:none;position:absolute;top:100%;left:0;min-width:200px;background:var(--panel,#11161D);border:1px solid var(--line,#1E252F);border-radius:8px;box-shadow:0 8px 32px rgba(0,0,0,.35);padding:6px;z-index:51}
.dd-menu::before{content:"";position:absolute;top:-8px;left:0;right:0;height:8px}
.dropdown.open .dd-menu{display:block}
.dd-menu a{display:flex;align-items:center;padding:10px 12px;min-height:44px;color:var(--muted,#97A2B0);text-decoration:none;border-radius:6px}
.dd-menu a:hover,.dd-menu a:focus{background:rgba(30,37,47,.5);color:var(--paper,#E8EAEE)}

/* chevron */
.chev{width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .18s ease}
.dropdown.open .chev{transform:rotate(225deg) translateY(1px)}

/* CTA area — one filled button, Login as quiet link */
.nav-cta{display:flex;align-items:center;gap:10px;margin-left:8px}
.nav-cta .quiet{color:var(--muted,#97A2B0)}
.nav-cta .btn{background:var(--accent,#FF7A1A);color:#170B02;border-radius:8px;padding:9px 16px;font-family:var(--mono,"IBM Plex Mono",monospace);font-weight:600;text-decoration:none;min-height:44px;display:inline-flex;align-items:center}
.nav-cta .btn:hover{filter:brightness(1.07)}
/* pages define their own .btn — neutralise anything nav.css does not set */
.nav-cta .btn{border:0;box-shadow:none;letter-spacing:normal;text-transform:none;line-height:1.2;font-size:.9rem;width:auto}

/* hamburger (hidden on desktop) */
.nav-toggle{display:none;background:none;border:0;padding:10px;min-width:44px;min-height:44px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px}
.nav-toggle .bar{display:block;width:22px;height:2px;background:var(--paper,#E8EAEE);border-radius:2px;transition:transform .2s,opacity .2s}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* mobile ≤768px */
@media (max-width:768px){
  .nav-toggle{display:inline-flex}
  .nav-menu{display:none;position:absolute;top:100%;left:0;right:0;background:var(--panel,#11161D);border-bottom:1px solid var(--line,#1E252F);flex-direction:column;align-items:stretch;gap:0;padding:8px 16px 16px}
  .site-header.nav-open .nav-menu{display:flex}
  .nav-menu > a,.nav-menu .dd-trigger{width:100%;justify-content:flex-start;min-height:48px;font-size:1rem}
  .dropdown{width:100%}
  .dd-menu{position:static;box-shadow:none;border:0;background:rgba(30,37,47,.35);margin:2px 0 6px 12px;padding:2px}
  .nav-cta{margin:12px 0 0;padding-top:12px;border-top:1px solid var(--line,#1E252F);flex-direction:row;justify-content:space-between;position:sticky;bottom:0;background:var(--panel,#11161D)}
  .nav-cta .btn{flex:1;justify-content:center}
}
.dd-menu .dd-label{display:block;padding:10px 12px 4px;margin-top:4px;border-top:1px solid var(--line,#1E252F);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--faint,#7D8796)}
.dd-menu a.dd-more{min-height:36px;padding:7px 12px;font-size:.92em}